USN-751-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-751-1

linux, linux-source-2.6.22 vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 8.10

Ubuntu 8.04 LTS

Ubuntu 7.10

Software description

linux

linux-source-2.6.22

Details

NFS did not correctly handle races between fcntl and interrupts. A localattacker on an NFS mount could consume unlimited kernel memory, leading toa denial of service. Ubuntu 8.10 was not affected. (CVE-2008-4307)

Sparc syscalls did not correctly check mmap regions. A local attackercould cause a system panic, leading to a denial of service. Ubuntu 8.10was not affected. (CVE-2008-6107)

In certain situations, cloned processes were able to send signals to parentprocesses, crossing privilege boundaries. A local attacker could sendarbitrary signals to parent processes, leading to a denial of service.(CVE-2009-0028)

The kernel keyring did not free memory correctly. A local attacker couldconsume unlimited kernel memory, leading to a denial of service.(CVE-2009-0031)

The SCTP stack did not correctly validate FORWARD-TSN packets. A remoteattacker could send specially crafted SCTP traffic causing a system crash,leading to a denial of service. (CVE-2009-0065)

The eCryptfs filesystem did not correctly handle certain VFS return codes.A local attacker with write-access to an eCryptfs filesystem could cause asystem crash, leading to a denial of service. (CVE-2009-0269)

The Dell platform device did not correctly validate user parameters. Alocal attacker could perform specially crafted reads to crash the system,leading to a denial of service. (CVE-2009-0322)

The page fault handler could consume stack memory. A local attacker couldexploit this to crash the system or gain root privileges with a Kproberegistered. Only Ubuntu 8.10 was affected. (CVE-2009-0605)

Network interfaces statistics for the SysKonnect FDDI driver did not checkcapabilities. A local user could reset statistics, potentially interferingwith packet accounting systems. (CVE-2009-0675)

The getsockopt function did not correctly clear certain parameters. A localattacker could read leaked kernel memory, leading to a loss of privacy.(CVE-2009-0676)

The ext4 filesystem did not correctly clear group descriptors whenresizing. A local attacker could exploit this to crash the system, leadingto a denial of service. (CVE-2009-0745)

The ext4 filesystem did not correctly validate certain fields. A localattacker could mount a malicious ext4 filesystem, causing a systemcrash, leading to a denial of service. (CVE-2009-0746, CVE-2009-0747,CVE-2009-0748)

The shared memory subsystem did not correctly handle certain shmctl callswhen CONFIG_SHMEM was disabled. Ubuntu kernels were not vulnerable, sinceCONFIG_SHMEM is enabled by default. (CVE-2009-0859)

The virtual consoles did not correctly handle certain UTF-8 sequences. Alocal attacker on the physical console could exploit this to cause a systemcrash, leading to a denial of service. (CVE-2009-1046)

Update instructions

The problem can be corrected by updating your system to the following
package version: